The only thing they can do is mag check and replace bearings (if you don't replace the gear set). If you were a TT I say for sure do it. Up to you on how much money you want to spend haha. Maintenance is always good!
I build race transmissions and I tell the people run it unless they want to service it and catch something before it grenades.
I'm about 750 crank horsepower on a 10" 5.43 and I have about 3,000 prerun miles and it looks brand new.